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Recognised as Colour

#1D538C

  • #1D538C
  • Blue
  • Dark
  • Nearest: Steel blue

#1D538C is a blue with RGB values 29, 83, 140 and HSL 211°, 66%, 33%. It is a dark colour, so white text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#1D538C#1D538C
HEX#1D538C
RGBrgb(29, 83, 140)
RGB (0–1)0.1137, 0.3255, 0.549
RGB percentages11.4%, 32.5%, 54.9%
HSLhsl(210.8, 65.7%, 33.1%)
HSV / HSBhsv(210.8, 79.3%, 54.9%)
CMYK79.3%, 40.7%, 0%, 45.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,921,932
CSS custom property--colour: #1D538C;

Brightness & contrast

Relative luminance0.08341WCAG 2.x, 0 is black and 1 is white
Perceived brightness80.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.87:1
Contrast with white7.87:1WCAG normal text: AAA
Contrast with black2.67:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#E2AC73

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#38578Eno red cones; affects about 1% of men; ΔE 4.6 from the original
Deuteranopia#264D8Bno green cones; the most common form, about 1% of men; ΔE 5.4 from the original
Tritanopia#006168no blue cones; rare, and affects men and women equally; ΔE 35.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.87:1WCAG large text: AAA
Contrast with black, large text2.67:1WCAG large text: Fail

Named colours

Steel blue · ΔE 19.9Dark slateblue · ΔE 23.4Cornflower blue · ΔE 30.6Slate grey · ΔE 32.3Light slate grey · ΔE 33.7Midnight blue · ΔE 36.2
Nearest named CSS colourSteel blue (#4682B4)ΔE 19.9, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8C561D
Analogous#1D8A8C, #1F1D8C
Triadic#8C1D53, #538C1D
Split complementary#8C1F1D, #8B8C1D
Tetradic#8C1D8A, #8C561D, #1D8C1F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8EB9E7
Lighter +30%#639FDF
Lighter +20%#3985D6
Lighter +10%#266CB6
Darker −10%#143A62
Darker −20%#0B2138
Darker −30%#03080D
Darker −40%#000000
More saturated +25%#0852A1
Less saturated −25%#325477

Channel breakdown

R29
G83
B140
Red29 (11.4%)
Green83 (32.5%)
Blue140 (54.9%)
Hue210.81°
Saturation (HSL)65.68%
Lightness33.14%
Dominant channelBlue
Hex per channelR 1D · G 53 · B 8C

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Every value on this page was computed from “1d538c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.